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#!/bin/sh
# **** DO NOT EVEN THINK OF EDITING OR REMOVING THIS FILE ****
# **** UNLESS YOU REALLY KNOW *EXACTLY* WHAT YOU ARE DOING. ****
# Determine the desired rootfs based on user flag files.
if [ -f /.ramdisk ] ; then
/bin/echo "Preferred root device is /dev/ram0 (maintenence)"
mounted=/mnt/tmpmnt
prefroot=maintenence
elif [ -f /.sda1root ] ; then
/bin/echo "Preferred root device is /dev/sda1 (disk 1)"
mounted=/mnt/tmpmnt
prefroot=sda1
elif [ -f /.sda2root ] ; then
/bin/echo "Preferred root device is /dev/sda2 (disk 1)"
mounted=/mnt/tmpmnt
prefroot=sda2
elif [ -f /.sdb1root ] ; then
/bin/echo "Preferred root device is /dev/sdb1 (disk 2)"
mounted=/mnt/tmpmnt
prefroot=sdb1
elif [ -f /.sdb2root ] ; then
/bin/echo "Preferred root device is /dev/sdb2 (disk 2)"
mounted=/mnt/tmpmnt
prefroot=sdb2
elif [ -f /.nfsroot ] ; then
/bin/echo "Preferred root device is NFS"
mounted=/mnt/tmpmnt
prefroot=nfsroot
else
/bin/echo "Preferred root device is jffs2"
mounted=
prefroot=jffs2
fi
# Perform prepatory tasks, and determine whether the desired rootfs is viable.
/bin/mount -t proc proc /proc
if [ $prefroot = "sda1" -o $prefroot = "sda2" -o $prefroot = "sdb1" -o $prefroot = "sdb2" ] ; then
/bin/echo "Sleeping 10sec while waiting for disk..."
sleep 10
/bin/mount -rt ext3 /dev/$prefroot /mnt/tmpmnt
if [ -L /mnt/tmpmnt/sbin/init -o -x /mnt/tmpmnt/sbin/init -o \
-L /mnt/tmpmnt/bin/init -o -x /mnt/tmpmnt/bin/init ] ; then
/bin/echo "Root filesystem will be mounted from /dev/$prefroot ..."
else
/bin/umount /mnt/tmpmnt
/bin/echo "Can't find valid rootfs on /dev/$prefroot, using jffs2 ..."
mounted=
prefroot=jffs2
fi
fi
if [ $prefroot = "maintenence" ] ; then
/bin/dd if=/dev/zero of=/dev/ram0 bs=1k count=12k 2>/dev/null
/usr/bin/mke2fs -m 0 /dev/ram0 12288
/bin/mount -t ext2 /dev/ram0 /mnt/tmpmnt
( /usr/bin/find . -print0 -mount | /usr/bin/cpio -p -0 -d -m -u /mnt/tmpmnt )
/bin/rm -f /mnt/tmpmnt/linuxrc
fi
if [ $prefroot = "nfsroot" ] ; then
sysconflen=`/bin/dd if=/dev/mtd1 bs=4 count=1 2>/dev/null | /usr/bin/hexdump -n 6 -e '"%02d"'`
ipaddr=`/bin/dd if=/dev/mtd1 bs=1 count=$sysconflen skip=4 2>/dev/null | grep ip_addr | sed -e s/ip_addr=//`
netmask=`/bin/dd if=/dev/mtd1 bs=1 count=$sysconflen skip=4 2>/dev/null | grep netmask | sed -e s/netmask=//`
gateway=`/bin/dd if=/dev/mtd1 bs=1 count=$sysconflen skip=4 2>/dev/null | grep gateway | sed -e s/gateway=//`
/sbin/insmod ixp400
/sbin/insmod ixp425_eth
/sbin/ifconfig ixp0 up $ipaddr netmask $netmask
/sbin/route add default gw $gateway
/sbin/ifconfig lo up 127.0.0.1
# The nfsrootloc and nfsrootopts vars can be overridden here.
. /.nfsroot
/bin/mount $nfsrootopts $nfsrootloc /mnt/tmpmnt
if [ -L /mnt/tmpmnt/sbin/init -o -x /mnt/tmpmnt/sbin/init -o \
-L /mnt/tmpmnt/bin/init -o -x /mnt/tmpmnt/bin/init ] ; then
/bin/echo "Root filesystem will be mounted from an NFS root ..."
mounted=/mnt/tmpmnt
else
/bin/umount /mnt/tmpmnt
/bin/echo "Can't find valid NFS rootfs, using jffs2 ..."
mounted=
prefroot=jffs2
fi
fi
if [ $prefroot = "jffs2" ] ; then
/bin/echo "Root filesystem will be mounted from /dev/mtdblock4 ..."
mounted=
fi
/bin/umount /proc
# Pivot to the desired rootfs and run the initial executable.
if [ -n "$mounted" ] ; then
cd $mounted
if [ -x ./sbin/init -o -L ./sbin/init ] ; then
runboot=/sbin/init
elif [ -x ./bin/init -o -L ./bin/init ] ; then
runboot=/bin/init
else
runboot=/bin/sh
fi
/sbin/pivot_root . initrd
exec /usr/sbin/chroot . $runboot < /dev/console 1> /dev/console 2> /dev/console
else
exec /bin/init
fi
/bin/echo "Can't chroot to $prefroot, using jffs2 ..."
exec /bin/init
# Last-resort fall-back - this should never be reached.
/bin/sh
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